难浸含砷金精矿的碱性常温、常压强化预氧化工艺工业化研究

提供了一种难浸含砷金精矿的湿法冶金新工艺及其10t／d规模的工业化研究结果。在对难处理金精矿常温、常压强化碱浸预氧化的工艺原理和强化碱浸氧化的动力学条件进行了深入研究的基础上,充分利用了机械活化和碱浸过程中的选择性氧化原理,采用物理与化学综合分离的方法,利用超细磨塔式磨浸机的机械活化和强化作用,以及强烈搅拌的强化作用,在常温、常压下引发砷硫矿物在高温、高压下才能发生的氧化反应,使被包裹在砷硫矿物中的金解离。在矿样粒度小于35．6μm含量为91．8％的磨矿细度条件下,对含砷3．55％、含硫24．8％、含金54．7g／t的难浸金精矿强化碱浸预氧化54h后,砷转化率为93.4％,硫的选择性氧化率为43．5％,金的氰化回收率由预氧化前的4％～9％提高到93．0％,金的炭吸附率99．8％,解吸率99．1％,电解回收率99．95％,冶炼回收率99．5％,总回收率91．5％。工艺总生产成本为562元／t。研究结果表明,该预氧化提金工艺技术先进、流程简单、环境安全,为难浸金矿石资源的有效开发利用提供了新方法。     

从难处理金精矿中氰化浸出金、银试验研究

采用氰化浸出工艺从预处理后的难处理金精矿中提取金、银。最佳氰化浸出条件为：液固比4：1,保护碱Na2CO3调节pH值9．5～10．5,氰化钠质量分数0．4％,氰化浸出96h。在此条件下,金、银浸出率分别达到96．53％、75．37％。同时,探索了复合保护碱对金、银浸出率的影响,使用复合保护碱m（Na2CO3）：m（NaOH）=3：1,金、银的浸出率分别达97．36％、75．59％,比采用单一保护碱Na2CO3时分别提高0．83％和0．22％。     

尾矿金再回收工艺研究

对某金矿浮选尾矿进行碱浸预处理提金工艺研究,其试验结果表明：在磨矿细度-0．045mm占95％、矿浆浓度50％、温度80℃、NaOH用量8kg／t、预处理时间4h,加入氧化剂的条件下,可获得70．11％的金浸出率。     

从某沉积污泥中提取金、银试验研究

采用焙烧-酸浸-氰化工艺从沉积污泥中提取金、银,试验考察了氰化浸出反应液固比、pH值、氰化钠质量分数、反应时间、搅拌速度对金、银浸出率的影响。沉淀污泥在焙烧温度903K、焙烧时间2h的条件下,进行预处理;焙砂在反应液固比4：1、硫酸浓度0．5mol／L、反应时间3h、反应温度323K、搅拌速度300r／min的条件下,进行硫酸浸出;酸浸渣在反应液固比4：1、pH10．5、氰化钠质量分数0．4％、反应温度298K、搅拌速度250r／min、反应时间72h的条件下,进行氰化浸出;金、银浸出率分别可达93．2％、79．1％。     

TW型塔式磨浸机构造和原理及其在黄金选冶厂的应用

描述了塔式磨浸机磨矿原理和边磨边浸机理，简要介绍了边磨边浸，炭吸附提金新工艺的半工业性试验效果，以及塔式磨浸机用于二段磨矿的生产结果。对利用塔式磨浸机超细磨处理含硫化物浸金矿石及废弃尾矿，强化碱浸顶预处理含砷难精金矿的实验室研究了工作也做了简要介绍，展示了塔式磨浸机在黄金选冶上的广泛应用前景。     

烧碱蒸发蒸汽消耗的探讨

通过理论分析，生产30％的烧碱，在现有蒸发工艺下的理论汽耗为2．556t汽／t碱。通过实施一些具体措施后取得了良好效果，汽耗由5．5t汽／t碱降3．2汽／t碱，成本降低103．5元／t碱，但汽耗距国内水平还有一定的差距，仍需进一步改进和完善。     

混合剂CZ在中国炭浆厂的助浸工艺

某炭浆厂处理量为250t／d，通过采用混合剂CZ助浸工艺，取得了较好的经济技术指标．金的浸出率由71．63％提高到95．07％，同时，氰化钠耗量由2．00kg／t矿降低到1．15kg／t矿，混合剂CZ耗量为0．20kg／ti．每年可为矿山降低药剂成本80万元以上，多增产黄金拆合人民币400多万元．生产实践证明，混合剂CZ助浸工艺是提高金的浸出率，降低生产成本的有效途径．     

从氰化尾渣中回收金的氰化工艺研究

焙砂氰化尾渣、细菌氧化—氰化工艺生产的氰化尾渣(后简称细菌氧化氰化尾渣)分别与助浸剂一起细磨10—30min后,在选择条件下进行常规氰化浸出,可使焙砂氰化尾渣的金品位从1—3g／t下降到0．3—0．5g／t,细菌氧化氰化尾渣的金品位从3—11．2g／t下降至0．5—1．1g／t,其中部分氰化尾渣金的氰化浸出率可达90％—95％。     

超细磨预处理难浸金矿石的研究

简述了超细磨预处理难浸金矿石的应用研究现状。对镇源冬瓜林金矿浮选精矿进行了试验研究,初步获得约８０％的氰化浸金率。考察了超细磨碱浸的作用,讨论了促进黄铁矿分解的机械化学机理。     

用稀酸淋浸法从铀钼矿石中浸出铀和钼

毛洋头570矿床为原生铀矿床，其中SiO2质量分数在70％以上，铀和钼的质量分数分别为0．116％和0．475％。采用稀酸淋浸法可浸出其中的铀和钼。矿石粒径小于10mm，淋浸剂质量浓度10g／L，pH2．0左右，电位-400mV以上，氧化剂为Fe2(SO4)3，浸出134d，80％以上的铀，50％左右的钼得到浸出。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.